We are not aware of which guidelines you are following, but the Daniel diet
of the Bible is a simple vegan diet, which would include nutritional yeast,
which is an inactive form of yeast, unlike the yeasts use for baking and
brewing.

The Jewish sages symbolically associated yeast with sin, because it
multiplies rapidly, so it was eliminated during the Passover celebration;
however, since nutritional yeast didn't exist in those days and does not
multiply, it shouldn't be included within the tradition.